Leather washer



. (No Model.) 2 Sheets-Sheet 1.

D. S. HALL. Leather Washer.

No. 243,036. Patented June 14,1881.

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(NoModeL) 2 Sheets-Sheet2.

D. S. HALL. Lather Washer.

No. 243,036. Patgnted June 14,1881.

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UNITED STATES PATENT OFFICE.

DAVID S. HALL, OF STOUGHTON, MASSACHUSETTS.

LEATHER WASH ER.

SPECIFICATION forming part of Letters Patent No. 243,036, dated June 14,1881.

Application filed January 17, 1881. (No model.)

To all whom it may concern:

Be it known that I, DAVID SOULE HALL, a citizen of the United States,residing atStoughton, in the county of Norfolk and State ofMassachusetts, have invented new and useful Improvements in LeatherWashers for Joints, of which the following is a specification.

Myimprovement consists ot'a special method of producing leather washersfor wheel hubs and axles from a straight strip of leather wound spirallyupon a wooden cylinder having a' plain surface, said strip being securedat the ends, so as to be bound tightly upon said cylinder; then, by asingle cutting, the coils are severed upon the cylinder in a lineparallel with its axis, and in which the cutting-tool penetrates thesurface of said cylinder sutiiciently to completely sever the coils,producing thereby a number of such washers at one operation. The coilsare severed crosswise in the same relative point and by moving thecutting-tool along a rest with pressure sufficient to cause the point ofsaid cutter to enter the surface of the cylinder. The cheapness andrapidity with which such washers are produced in this way is a matterofmuch importance.

In the drawings I have shown, in Figure 1, a straight strip of leather,from which the washers are formed after it is wound spirally upon awooden cylinder. Fig. 2 is a formed washer with its ends joining; Fig.3, a washer having its ends separated, and Fig. 4. a crosssection of thewasher, while Figs. 5 and 6 illustrate the method of forming suchwashers, Fig. 5 being a top view, and Fig. 6 across-section, of a woodencylinder, showing the leather strip secured thereon and the cutter andits guide in the relation they occupy for severing the coiled strip.

I cut strips of leather, a, of the proper thickness and width, withparallel sides, and of such length as the stock will produce, and temperthem in water to render them pliable. I provide a wooden cylinder of thedesired diameter and with a smooth surface, and wind at strip thereonspirally and fasten its ends by tacks or otherwise, the cylinder beingheld in a lathe. The strip in drying will be bound tightly upon thecylinder. A cutter is then run longitudinally along the cylinder inastraight line, being supported by a rest, so that the point just entersthe surface of the cylinder, and thus severs the coils crosswise at arelative pointin each coil, and by a single movement of the cutterproduce a number of ring-washers of the same size. The rings thus cutwill separate at their ends sufficiently to leave a space, I), whichserves as a reservoir for oil or other lubricant when the washer is inuse and forms a self-adjusting washer. The strips are cut so that thewasher, when formed, will present the cross-grain as the wearing sides 0c to increase their durability.

1 use different sizes of wooden cylinders to producewashers of differentsizes, which have hitherto been formed by dies of difierent sizes.

Referring to Figs. 5 and 6, a is the leather strip, coiled upon thesmooth-surfaced wooden cylinder d, and secured at its ends by pins d, soas to be firmly and compactly bound thereon. e are the lathe-centers forthe cylinder. f is the guide-rest for the cutting-tool g, and h is thehandle, by which the cutter is operated by running it along the rest,which is shown as a slotted bar, so that the cutteris directed in astraight line and gaged with its point just entering the surface of thecylinder, so as to completely sever the coils along such line.

I am aware that washers have been formed from a strip of leather so asto produce a grain wearingsurface; but such leather washers have notbeen produced by the method which I have described, in which a woodenformer is used, and upon which the leather strip is wound spirally andcut by drawing a cutter over the coils while they are bound upon saidcylinder.

The method herein described of forming leather washers, consisting inwinding a leather strip spirally upon a wooden cylinder and severingsaidspirally-wound strip on a line cylinder sufficient to completely severthe coils,

substantially as specified.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

DAVID SOULE HALL. WVitnesses:

ELLIS DRAKE, OsoAR A. MARDEN.

